Australia has quite a large Muslim population. A large majority of that population get along well with everyone else. But a vocal minority within that group causes a lot of chaos and generally weakens relations between locals and those groups.
Take the Cronulla Riots, they occured in retaliation to a situation where a muslim womans headscarf being removed to properly assess if she needed CPR by lifeguards and 4 muslim men attacking them for infringing their beliefs. This led to a lot of back and forward attacks organised via text message. The actual riots were initially intended as a peaceful protest to support the lifeguards who are there to save peoples lives, however a minority of those people were drunken yobbos and when a group of muslim men began abusing them on the beach, the drunks from the crowd retaliated and beat them senseless. However more innocent people got caught up in the violence that time because of the large scale of people providing cover for the jerks who used it as an excuse to be racist and bash any ethnic minority. A lot of the people beaten were actually Indian.
But the large part of the problem is the amount of segregation of the Muslim community from those around it. The Lakemba Mosque is a heavily guarded fortress where a lot of Muslim people congregate. If you even hang around it's perimeter and aren't middle eastern looking you will either be bashed or pushed onto the road. It's very dangerous.
That community is also very Anti-Turkish and Anti-Croatian, and will go out of their way to make people from those communities feel unwanted.
There is also a big thing about never touching Muslim women. I was at the local shops (Bankstown) and a Muslim woman fell down the escalators. People were just standing around watching her as the stairs kept hitting her as she struggled to get up. I just reacted and grabbed her arm and helped to lift her up, as did a teenage Chinese girl nearby. We helped the woman to a nearby bench where she freaked out that we'd even touched her to help her up and began crying. I was beaten over the head and had to run off, the girl also ran off upon seeing this. I could pretend that it'd been such a bad experience that I'd leave someone in that situation again... but I'd still go help them regardless.
Oh and there is a very strict no interracial relationships within that community. If you talk in a suggestive manner to one of "their" women, you'll likely have your tyres slashed if not worse.
TL
R
The Muslim community as a whole keeps itself segregated from the larger Australian community. The violent minorities within that group are a major problem to everyone and make it hard to even be friends with people from those communities. If you don't want to get beaten up, don't touch their women.